Windows Security, Types of Windows

Window glazing — the glass — is mounted in a sash (made of wood, steel, aluminum or vinyl), which in turn fits into a wood or metal window frame. The most common designs are:

Vertical sliding (single or double-hung) windows are widely used. Their biggest drawback is the crescent lock with which most such windows are fitted. The lock can be opened from outside with a knife slipped between the inner and outer sash. Its fasteners, like those of most window locks, are apt to pull free of the wood when force is applied at the sash. Equipped with a better lock, this type of window provides good security.

Casement windows are hinged on one side and open out like a door, using a crank or lever. Those in good repair and equipped with a key-operated lock provide good security. Keep in mind, some windows should be considered emergency exits and key-locked devices may not be ideal if the key is misplaced or the window needs to be used by people with an agility disability or limited hand function. Note: for persons with disabilities, casement windows are ideal. Ensure there is only one lever lock on the lower part of the window for easy access or install hardware that is available to close the top and bottom levers from one location. Closing only the bottom lever on a window with a top and bottom lever can result in a drafty window or an insecure window that can be pried open.

Awning windows are hinged at the top or bottom. They offer good security if equipped with a strong lock.
Horizontal sliding windows slide inside a track, similar to patio doors. Security can be good to poor, depending on the design and manufacture. Many of the older, metal-sashed windows could be lifted out of their tracks from outside, but this problem has been overcome on more recent models.

Fixed windows (picture windows, vision panels, skylights) do not open. They provide good security. Thieves may cut a hole large enough to gain entry or break the glass, but doing so creates a high risk of injury and detection. Most thieves will not break a large picture window unless they are assured of a substantial reward and quick escape. security, including the crime rate in your area, the value of the contents you wish to protect and how much you can afford to spend.